Samsung bn44-00977a Tv Dc Vss Power Supply Board

Product Description

The SAMSUNG bn44-00977a is a DC VSS power supply board designed for LED and LCD televisions. It converts incoming AC power into regulated DC voltages required by the television's internal systems. Mounted inside the TV chassis, the board delivers stable power to the display driver, control boards, and audio circuitry. It also provides protection against voltage variations that could damage sensitive downstream electronics. This type of board is typically replaced by a qualified electronics technician or experienced service professional during a no-power or power-cycling fault diagnosis.

The bn44-00977a carries the internal designation L55S7NA_RHS, indicating a right-hand-side board configuration associated with a 55-inch class Samsung television platform. It is intended for use in residential flat-panel televisions where the original power supply board has failed, showing symptoms such as no picture, no backlight, standby-only operation, or repeated power cycling. Replacement is performed at the board level as a direct swap of the existing failed unit.

Key Features

• Converts AC mains input to regulated DC voltages for internal TV subsystems
• Supplies stable power to the display driver, main control board, and audio circuitry
• Includes voltage regulation to protect sensitive downstream electronics
• Internal designation L55S7NA_RHS identifies right-hand-side board orientation
• Board-level replacement format for direct OEM-style swap

Compatibility

Designed as an OEM-style replacement power supply board for Samsung 55-inch class LED and LCD flat-panel televisions using the L55S7NA_RHS power board configuration.

Installation Notes

Power supply board replacement should be performed by a qualified electronics technician. Disconnect the television from AC mains power and allow capacitors to discharge fully before opening the chassis. Observe standard ESD precautions when handling the board. Reconnect all ribbon cables and power harness connectors securely before restoring power to the set.